diff options
Diffstat (limited to 'drivers/media/tuners/mt2060.c')
| -rw-r--r-- | drivers/media/tuners/mt2060.c | 211 |
1 files changed, 172 insertions, 39 deletions
diff --git a/drivers/media/tuners/mt2060.c b/drivers/media/tuners/mt2060.c index 13381de58a84..4b9dca2f17cc 100644 --- a/drivers/media/tuners/mt2060.c +++ b/drivers/media/tuners/mt2060.c @@ -1,22 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for Microtune MT2060 "Single chip dual conversion broadband tuner" * * Copyright (c) 2006 Olivier DANET <odanet@caramail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.= */ /* In that file, frequencies are expressed in kiloHertz to avoid 32 bits overflows */ @@ -27,7 +13,7 @@ #include <linux/i2c.h> #include <linux/slab.h> -#include "dvb_frontend.h" +#include <media/dvb_frontend.h> #include "mt2060.h" #include "mt2060_priv.h" @@ -42,43 +28,89 @@ MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); static int mt2060_readreg(struct mt2060_priv *priv, u8 reg, u8 *val) { struct i2c_msg msg[2] = { - { .addr = priv->cfg->i2c_address, .flags = 0, .buf = ®, .len = 1 }, - { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, .buf = val, .len = 1 }, + { .addr = priv->cfg->i2c_address, .flags = 0, .len = 1 }, + { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, .len = 1 }, }; + int rc = 0; + u8 *b; + + b = kmalloc(2, GFP_KERNEL); + if (!b) + return -ENOMEM; + + b[0] = reg; + b[1] = 0; + + msg[0].buf = b; + msg[1].buf = b + 1; if (i2c_transfer(priv->i2c, msg, 2) != 2) { printk(KERN_WARNING "mt2060 I2C read failed\n"); - return -EREMOTEIO; + rc = -EREMOTEIO; } - return 0; + *val = b[1]; + kfree(b); + + return rc; } // Writes a single register static int mt2060_writereg(struct mt2060_priv *priv, u8 reg, u8 val) { - u8 buf[2] = { reg, val }; struct i2c_msg msg = { - .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = 2 + .addr = priv->cfg->i2c_address, .flags = 0, .len = 2 }; + u8 *buf; + int rc = 0; + + buf = kmalloc(2, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + buf[0] = reg; + buf[1] = val; + + msg.buf = buf; if (i2c_transfer(priv->i2c, &msg, 1) != 1) { printk(KERN_WARNING "mt2060 I2C write failed\n"); - return -EREMOTEIO; + rc = -EREMOTEIO; } - return 0; + kfree(buf); + return rc; } // Writes a set of consecutive registers static int mt2060_writeregs(struct mt2060_priv *priv,u8 *buf, u8 len) { + int rem, val_len; + u8 *xfer_buf; + int rc = 0; struct i2c_msg msg = { - .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = len + .addr = priv->cfg->i2c_address, .flags = 0 }; - if (i2c_transfer(priv->i2c, &msg, 1) != 1) { - printk(KERN_WARNING "mt2060 I2C write failed (len=%i)\n",(int)len); - return -EREMOTEIO; + + xfer_buf = kmalloc(16, GFP_KERNEL); + if (!xfer_buf) + return -ENOMEM; + + msg.buf = xfer_buf; + + for (rem = len - 1; rem > 0; rem -= priv->i2c_max_regs) { + val_len = min_t(int, rem, priv->i2c_max_regs); + msg.len = 1 + val_len; + xfer_buf[0] = buf[0] + len - 1 - rem; + memcpy(&xfer_buf[1], &buf[1 + len - 1 - rem], val_len); + + if (i2c_transfer(priv->i2c, &msg, 1) != 1) { + printk(KERN_WARNING "mt2060 I2C write failed (len=%i)\n", val_len); + rc = -EREMOTEIO; + break; + } } - return 0; + + kfree(xfer_buf); + return rc; } // Initialisation sequences @@ -157,7 +189,6 @@ static int mt2060_set_params(struct dvb_frontend *fe) { struct dtv_frontend_properties *c = &fe->dtv_property_cache; struct mt2060_priv *priv; - int ret=0; int i=0; u32 freq; u8 lnaband; @@ -184,7 +215,7 @@ static int mt2060_set_params(struct dvb_frontend *fe) f_lo2 = f_lo1 - freq - IF2; // From the Comtech datasheet, the step used is 50kHz. The tuner chip could be more precise f_lo2 = ((f_lo2 + 25) / 50) * 50; - priv->frequency = (f_lo1 - f_lo2 - IF2) * 1000, + priv->frequency = (f_lo1 - f_lo2 - IF2) * 1000; #ifdef MT2060_SPURCHECK // LO-related spurs detection and correction @@ -240,7 +271,7 @@ static int mt2060_set_params(struct dvb_frontend *fe) if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */ - return ret; + return 0; } static void mt2060_calibrate(struct mt2060_priv *priv) @@ -307,9 +338,16 @@ static int mt2060_init(struct dvb_frontend *fe) if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */ + if (priv->sleep) { + ret = mt2060_writereg(priv, REG_MISC_CTRL, 0x20); + if (ret) + goto err_i2c_gate_ctrl; + } + ret = mt2060_writereg(priv, REG_VGAG, (priv->cfg->clock_out << 6) | 0x33); +err_i2c_gate_ctrl: if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */ @@ -326,26 +364,31 @@ static int mt2060_sleep(struct dvb_frontend *fe) ret = mt2060_writereg(priv, REG_VGAG, (priv->cfg->clock_out << 6) | 0x30); + if (ret) + goto err_i2c_gate_ctrl; + + if (priv->sleep) + ret = mt2060_writereg(priv, REG_MISC_CTRL, 0xe8); +err_i2c_gate_ctrl: if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */ return ret; } -static int mt2060_release(struct dvb_frontend *fe) +static void mt2060_release(struct dvb_frontend *fe) { kfree(fe->tuner_priv); fe->tuner_priv = NULL; - return 0; } static const struct dvb_tuner_ops mt2060_tuner_ops = { .info = { - .name = "Microtune MT2060", - .frequency_min = 48000000, - .frequency_max = 860000000, - .frequency_step = 50000, + .name = "Microtune MT2060", + .frequency_min_hz = 48 * MHz, + .frequency_max_hz = 860 * MHz, + .frequency_step_hz = 50 * kHz, }, .release = mt2060_release, @@ -371,6 +414,7 @@ struct dvb_frontend * mt2060_attach(struct dvb_frontend *fe, struct i2c_adapter priv->cfg = cfg; priv->i2c = i2c; priv->if1_freq = if1; + priv->i2c_max_regs = ~0; if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */ @@ -396,7 +440,96 @@ struct dvb_frontend * mt2060_attach(struct dvb_frontend *fe, struct i2c_adapter return fe; } -EXPORT_SYMBOL(mt2060_attach); +EXPORT_SYMBOL_GPL(mt2060_attach); + +static int mt2060_probe(struct i2c_client *client) +{ + struct mt2060_platform_data *pdata = client->dev.platform_data; + struct dvb_frontend *fe; + struct mt2060_priv *dev; + int ret; + u8 chip_id; + + dev_dbg(&client->dev, "\n"); + + if (!pdata) { + dev_err(&client->dev, "Cannot proceed without platform data\n"); + ret = -EINVAL; + goto err; + } + + dev = devm_kzalloc(&client->dev, sizeof(*dev), GFP_KERNEL); + if (!dev) { + ret = -ENOMEM; + goto err; + } + + fe = pdata->dvb_frontend; + dev->config.i2c_address = client->addr; + dev->config.clock_out = pdata->clock_out; + dev->cfg = &dev->config; + dev->i2c = client->adapter; + dev->if1_freq = pdata->if1 ? pdata->if1 : 1220; + dev->client = client; + dev->i2c_max_regs = pdata->i2c_write_max ? pdata->i2c_write_max - 1 : ~0; + dev->sleep = true; + + ret = mt2060_readreg(dev, REG_PART_REV, &chip_id); + if (ret) { + ret = -ENODEV; + goto err; + } + + dev_dbg(&client->dev, "chip id=%02x\n", chip_id); + + if (chip_id != PART_REV) { + ret = -ENODEV; + goto err; + } + + /* Power on, calibrate, sleep */ + ret = mt2060_writereg(dev, REG_MISC_CTRL, 0x20); + if (ret) + goto err; + mt2060_calibrate(dev); + ret = mt2060_writereg(dev, REG_MISC_CTRL, 0xe8); + if (ret) + goto err; + + dev_info(&client->dev, "Microtune MT2060 successfully identified\n"); + memcpy(&fe->ops.tuner_ops, &mt2060_tuner_ops, sizeof(fe->ops.tuner_ops)); + fe->ops.tuner_ops.release = NULL; + fe->tuner_priv = dev; + i2c_set_clientdata(client, dev); + + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static void mt2060_remove(struct i2c_client *client) +{ + dev_dbg(&client->dev, "\n"); +} + +static const struct i2c_device_id mt2060_id_table[] = { + { "mt2060" }, + {} +}; +MODULE_DEVICE_TABLE(i2c, mt2060_id_table); + +static struct i2c_driver mt2060_driver = { + .driver = { + .name = "mt2060", + .suppress_bind_attrs = true, + }, + .probe = mt2060_probe, + .remove = mt2060_remove, + .id_table = mt2060_id_table, +}; + +module_i2c_driver(mt2060_driver); MODULE_AUTHOR("Olivier DANET"); MODULE_DESCRIPTION("Microtune MT2060 silicon tuner driver"); |